Neat tangent: the article refers to polarization of light being "practically indiscernible to the human eye." You can in fact see the polarization of light, an

Neat tangent: the article refers to polarization of light being "practically indiscernible to the human eye." You can in fact see the polarization of light, and can train yourself to notice it in various situations. The phenomenon is known as Haidinger's Brush (https://en.wikipedia.org/wiki/Haidinger%27s_brush https://en.wikipedia.org/wiki/Haidinger%27s_brush) and one of the easiest ways I've found to see it is to look at an LCD monitor (i'm using a very old macbook pro). Stare at a mostly-white part of the screen and tilt your head from side-to-side while maintaining your gaze at a single area on the screen. When you tilt one way, you should see a weird yellow and blue blob pointing one direction, and when you tilt the other way that blob should be shifted 90 degrees. The effect is -super- subtle.